Dust-arrester.



No. 810,830. y 4 PATENTE) Nov. 121907.

y ELBGHTENBBRG.

- DUST ARRESTER.

APPLIQATION FILED 00mm. 190s.

2 SHEETS-SHEET l.

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PATENT@ Nov, 12, 1907. K

ELBHTBNBERG. DUST ARRESTBR. PPLTION FILED 0OT.25| 1906.

s Emma-SHEET 2.

- 15 members within the arresta-teasing partly in elevation 30 tio by suitable piping leading from the point or pointsA nu TED sira'gns Parana? OFFICE.

HENRY -LBCHTENBILRG, OF QIIIXCY, ILLINOIS. ASSIGXOR 'ILO Ul-INTR-AL IltOiY WORKS, OF QUIXCY, ILLINOIS, A CORIOILTIOX.

DUST-.ARRESTER To allie/10m it may concern:

Be it known that I, Hex nr Lncn'rex'nano, a citizen of thd United States of America. residing in Quincy, in the county of Adams and State oi Illinois, have invented certain new and useful Improvements in Dust- Arresters, of which thc follo'wing,r a full, clear, and

exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a dust arrester mor'e particularly intended for use in collect-ing the dust produced in tumbling mills and by polishing wheels and cinery wheels.

Figure I is a vertical longitudinal section taken through my dust arrester and illustrating the screen and partly in section. Fig. II isan' enlarged 'view of a portionof one ot' the screen members partly broken away, vthe valve boa at the rear end of the-arrester and the hammer mechanism by which the screen members are jarred to discharge.accumulations of dust gathered on' the exterior surfaces. Fig. iIl is an enlarged cross section taken through .one ol' the screen mernbers'and l. bowing one of the hammers in elevation. F IV is -an elevation of the door at the rear end of the arrester. l designates the casing of my dust arrester which 'is i provided-at `its bottom with ahopper 2 and contains aj dust receiving chamber 3. The dust to be gathered in: the arrester enters the dust receiving chamber through an orice 4 in the casing l. aft er being cond ucted theroat which the dust is produced.

'5 is an 'air outlet in the forward end wall of the casing 1 that is surrounded by a suction pipe 6 that has associated with it a suction fan or any desirable means for producing a suction in said pipe (not shown).

'7l designates 'a ring or tube located adjacent to the forward wall of the casing l and interior ofsaid casing in a position to surround the air outlet 5.

8 is a ring or tube located Iinterior of the casing 1 and at the rear wall of said casing in alinement with the ring 7.

A is a series lof screen members that are disposed between the rings'Y-and 8. These screen members consist of frames that are covered with suitable sheets 9 of fabric, such as can vas, the frames preferably cornprising central rectangular members IO which are'lorated in alinement with the rings to provide a coninte ons duct through all of said members centrally of the screen, arms 11 exteilding outwardly from the members I0, and a border l2.' 10" are central rectangular spacing members located between each pair of screens. l The screens are preferably connected to each oi her by g screws which unite the central members l() and spacing members 10 shown in lFig. III and serve to af- Specification ot' Letters Patent. reputation and omni 25. 190s. sesam. 340.476.

' Patentes Nov. 12, 1907.

ford substantially air tight joints between the screen 55 members.

The dust and dust laden air from which the dust is to be arrested are drawn into the dust receiving chamvfollowing the course of the air by the screens` and gathers upon the outer surface of the screen members. During this process a partial vacuum is created interior of the screen membersand within the dust receivingrl chamber and due to the-existence oi a large area of screening surfaces in the arrester thisyvacuum is maintained practically the saine both interior and exterior oi'the screen members, as avconsequenceof 70 which the suctional action within the arrester isprevented from drawingthe dust through ,the screen members, requiring that it settle in Athe hopper 2 at the bottom of the dust receiving'chamber. 13 is a 'valve at the lower end of said hopper that may be 475 opened for the discharge of thev collecteddust.

YFor the purpose of dislodging the dust that accumulates upon the exterior sufaceot the screen mem` bers A, I provide a. jarring mechanism which consists of strips 14 attached to the centralscr'een frame mem- 80 hers 10 and 'extending longitudinally of these'ries ofscreens and hammers 15 that are pivotally'connected at4 16 to thecentml screen trame membeis. These hammers are operated throughlth medium oa suitably driven shaft 17-extendingvlongitudinally of the 85 screen members and providedlwithgcams 18 that are adapted to engage the rear ends of the hammer arms thereby causing the hammers to partake of a rise-and fall motion and act with jarring tect upon the strips 14 and the screen members to which saidstrips are 90 attached. This jarring mechanisxnis intended to he placed into operation only periodically during .the serviceof lthe dust arrester.

ln the\rear wall ofthe casing 1 is an air inlet 19 ad` vjacent to which -is avalve box 20 that is provided with 95 a-cover-'valve 21.

22 is a screw stem seated in the valvebox and adapt ed to be operated to open the "alte 21 and hold it in an open position when it is desired to admit air from the exterior or' the dust arrester to the compartments 100 interior of the screen members` for the purpose of iessening the degree of suction therein if such suction should at any time prove too strong in the operation of arresting the dust delivered into the dust receiving chamber. The valve box is preferably attachedv to a door23 that 105 mounted in the rear wall of the casing I and nor mallj' held in closed position by a catch 24 (see Fig. IV). lt will be observed that due to the construction of Alates throughout the extent of the space in each screen tion pipe leading from the air outlet, a series of screens the screen members A, as described, wherein the sheets I of .fabric are attached to frames on which the sheets are stretched and which are arrangedin series, the screen members are rendered bag shape to provide an air space within each member into which the air drawn by suction in the pipe 6 freely enters and circumember.

1. A dust arrester comprising a casing, providingadust receiving chamber, formed with a dust inlet oriiice at the bottom, an air inlet at the rear end of the casing, an air outlet at the forward end of the casing, a hopper beneath the casing, an interior rear ring surrounding the air inlet, an interior forward ring surrounding the air outlet, a Suction pipe leading fromthe air outlet, and a series of screens supported between the rings, each screen consisting of a pair of central rectangular' members spaced apart and in alinement with the rings, a border, converging arms extending from the rectangular members to the border and screen material covering' the space between the rectangular members and the border'.

2. A dust arrester comprising a casing, providing a dust receiving chamber formed with a. dust inlet orifice at'the bottom, Ian air' inlet at the rear` end of the casing, an air outlet at theforward end of the casing, a hopper beneath the casing, an interior rear ring surrounding the air inlet, an interior forward ring surrounding the air outlet, a sucsupported between the rings each screen consisting of a pair of central rectangular members spaced apart and in nlinement with the rings, a. border, converging arms cxtending from the rectangular members to the.border, and screen material covering the space between the rectangular members and the border, and central rectangular spacing members between the screens.

3. A dust arrester comprisingr a casing, providing a dust receiving chamber formed with a dnst inlet orifice at the bottom, an air inlet at the rear end of the casing, anair outlet at the forward end o the casing, a hopper beneath the casing, an interior rear ring surrounding the air i,piet, an interior forward ring surrounding the air outlet, a suction pipe leading from the air outlet, a series of screens supported between the rings each screen consisting of a pair of central rectangular members spaced apart and in tangular members, and o. driven shaft extending through the series of screens, and having cams adapted to engage the hammers.

4. A clust arrester comprising a casing, providing a dust receiving chamber formed with a dust inlet orifice at the bottom, an air inlet at the rear end of the casing, an air outlet at the4 forward end of the casing, a hopper beneath the casing, an interior rear ring surrounding the air inlet, an interior forward ring surrounding the air outlet, a suction pipe leading from the air outlet, a series of screens supported between the rings each screen consisting oth pair of central rectangular members spaced a'part and in alinement with the rings, a border, converging arms extending from the rectangular members to the border, and screen material covering the space between the rectangular members and the border, a. valve box adjacent to the air 2 inlet having a cover-valve, and -an adjustable screw stem adapted to work through the bottom of the valve box and against the cover-valve for controlling the latter.

5. A dust arrester comprising a casing, provldingadust receiving chamber formed with a dust inlet orli'lce at the bottom, an air inlet at the rear end of the casing, a'n air` outlet at the forward end of the casing, a hopper beneath the casing, en interior rear ring surrounding the air inlet, an interior forward ring surrounding the air outlet, a. suction pipe leading from the air outlet, a. series of screens Supported between' the rings each screen consisting. of a pair of central rectangular members spaced apart and A in alinement with the rings, a border, converging arms extending from the rectangular members to the border, and screen material covering the space between the rectangular members and the border, a door hinged to the casing'at the air inlet, a valve-boi: having a cover-valve and mounted 'in the door, and an ,adjustable screw-stem adapted to work through the bottom of the valve-box and against the covervaive for controllingr the latter.

HENRY LECHTENBERG. 

